CN218446243U

CN218446243U - Optical system

Info

Publication number: CN218446243U
Application number: CN202222787406.1U
Authority: CN
Inventors: 王英任; 陈怡和; 吴亚修
Original assignee: TDK Taiwan Corp
Current assignee: TDK Taiwan Corp
Priority date: 2021-10-22
Filing date: 2022-10-21
Publication date: 2023-02-03
Anticipated expiration: 2032-10-21
Also published as: CN116009177A; US20230131503A1; EP4170413A2; CN116009273A; CN219065853U; US20230127990A1; CN116009176A; US20230127889A1; US20230127183A1; CN218512699U; US20230129823A1; CN218481686U; CN218446133U; CN116009175A; US20230132120A1; EP4170413A3; CN220401834U

Abstract

An optical system includes an optical module, a fixed portion, a movable portion and an elastic member. The movable part can be used for bearing an optical module, and the elastic piece is connected with the movable part and the fixed part and used for inhibiting the vibration of a first frequency of the optical system.

Description

Optical system

Technical Field

The utility model relates to an optical system. More particularly, the present invention relates to an Optical system having an Optical Image Stabilization (OIS) function.

Background

With the development of technology, many electronic devices (such as smart phones or digital cameras) today have a function of taking pictures or recording videos. The use of these electronic devices is becoming more common and the design direction of these electronic devices is being developed to be more convenient and thinner to provide more choices for users.

Some electronic devices with a camera or video recording function are provided with a lens driving module to drive an Optical element to move, so as to achieve the functions of auto focus (auto focus) and Optical Image Stabilization (OIS). The light can pass through the optical element to form an image on a photosensitive element.

However, for the vehicle camera device, it is a major challenge for the researchers in this field to design an optical system capable of effectively suppressing vibration.

SUMMERY OF THE UTILITY MODEL

The present disclosure is directed to an optical system to address at least one of the problems set forth above.

In view of the foregoing conventional problems, an embodiment of the present invention provides an optical system, which includes an optical module, a fixed portion, a movable portion and an elastic member. The movable part can be used for bearing the optical module, and the elastic piece is connected with the movable part and the fixed part and used for inhibiting the vibration of a first frequency of the optical system.

In one embodiment, the elastic member is a steel cable or a spring or a combination thereof.

In one embodiment, the elastic member is disposed at a corner of the fixing portion.

In one embodiment, the optical system includes two elastic members disposed on opposite sides of the fixing portion.

In an embodiment, the optical system includes three elastic members disposed at different sides or different corners of the fixing portion.

In an embodiment, the fixing portion has a quadrilateral structure, and the optical system includes four elastic members respectively disposed at four corners of the fixing portion.

In an embodiment, the optical system further includes a circuit component, and the optical module includes an optical element and an image sensing unit connected to each other, wherein the circuit component is electrically connected to the image sensing unit, and the elastic element is electrically independent from the circuit component.

In an embodiment, the optical system further includes a circuit component, and the optical module includes an optical element and an image sensing unit connected to each other, wherein the circuit component is electrically connected to the image sensing unit and grounded through the elastic member.

In an embodiment, the optical system further includes a supporting unit fixed on the movable portion and connected to the elastic member.

In one embodiment, the supporting unit is formed with a plurality of bumps, and the bumps are connected to the movable portion.

In one embodiment, a recess is formed between the bumps, and the elastic member is connected to the recess.

In an embodiment, the optical system further includes a spring connecting the movable portion and the fixed portion, and the spring surrounds an optical axis of the optical module.

In an embodiment, the optical system further includes a circuit component, and the optical module includes an optical element and an image sensing unit connected to each other, wherein the circuit component is electrically connected to the image sensing unit and passes through the spring.

In an embodiment, the optical system further includes a damping element disposed between the fixed portion and the movable portion.

In an embodiment, the movable portion has a supporting member, a frame and an active damping mechanism, the supporting member is movably connected to the frame and supports the optical module, and the active damping mechanism is disposed on the supporting member and the frame for damping a second frequency of vibration of the optical system.

In an embodiment, the optical system further includes a connecting member, a plurality of clamping members and a plurality of spherical elements, the spherical elements are disposed on the connecting member, and the clamping members are respectively fixed on the supporting member and the frame and respectively clamp the spherical elements.

In one embodiment, the optical system includes a plurality of elastic members disposed at different corners of the fixed portion, and the clamping members are disposed at different sides of the movable portion, wherein the clamping members are respectively disposed between adjacent elastic members.

In one embodiment, the active damping mechanism includes a coil and a magnet, the magnet is disposed on the carrier, and the coil is disposed on the frame.

In one embodiment, the active damping mechanism includes a piezoelectric element or a shape memory alloy element disposed between the carrier and the frame.

In an embodiment, the optical system further includes a position sensor disposed on the supporting member or the frame for sensing a position change of the supporting member relative to the frame.

In an embodiment, the optical system further includes an inertial sensor disposed on the carrier.

In one embodiment, the second frequency is less than the first frequency.

In one embodiment, the first frequency is greater than 1Hz.

In one embodiment, the first frequency is greater than 10Hz.

The beneficial effects of the present disclosure reside in that, the utility model provides an optical system, it not only possesses the non-active damper who constitutes by elastic component and/or spring, has also possessed the active damper who constitutes by magnet and coil simultaneously for restrain optical system's low frequency and the vibrations of high frequency, thereby make optical system can use under the driving state, and can promote its efficiency and stability by a wide margin.

Drawings

Fig. 1 shows an exploded view of an optical system according to an embodiment of the present invention.

Fig. 2 shows a perspective view of the optical system of fig. 1 after assembly.

Fig. 3 shows a perspective view of the optical system of fig. 1 with the front cover removed.

Fig. 4 shows a perspective view of the mechanism inside the housing in fig. 3.

Fig. 5 shows an exploded view of the mechanism inside the housing in fig. 3.

Fig. 6 is a perspective view of the carrier, the frame, and the connecting member of fig. 1 after being coupled.

Fig. 7 shows an exploded view of the carrier, frame and connector of fig. 6 after joining.

Fig. 8 shows a schematic view of the four cantilevers of the connecting element connecting the carrier and the frame via the clamping element and the ball element.

Fig. 9 shows a cross-sectional view of the optical system of fig. 2 with the front cover removed.

Fig. 10 shows another cross-sectional view of the optical system of fig. 2 with the front cover removed.

Fig. 11 shows a cross-sectional view of the optical system of fig. 2 with the optical module and the front cover removed.

Fig. 12 shows a perspective view of the elastic member coupling support unit.

Fig. 13 is a perspective view showing the optical system according to another embodiment of the present invention in which the support units are connected to each other by springs.

Fig. 14 shows a cross-sectional view of a support unit in an optical system connected by both an elastic member and a spring.

Fig. 15 shows a schematic view of a ball element positioned between two adjacent elastic members.

The reference numbers are as follows:

100 optical system

10 optical module

11 optical element

12 image sensing unit

121 image sensor

122 circuit board

123: connector

20 bearing part

21 groove (c)

22: card slot

30: frame

31 projecting part

32, a clamping groove

40 connecting piece

41 cantilever

42 round frame

50 clamping piece

60: circuit board

70 base

80: cable

B spherical element

C, coil

F1 supporting unit

F2 supporting unit

F21 bump

F22 concave part

G damping element

H1: shell

H2 front cover

H21 opening

M is magnet

O optical axis

P: circuit assembly

P1: circuit board

P2 circuit board

P3 connection circuit

R is spring

S locking and fixing piece

W is an elastic member

Detailed Description

The optical system according to the embodiment of the present invention is explained below. It should be appreciated, however, that the embodiments of the present invention provide many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The particular embodiments disclosed are illustrative only of the use of the invention in particular ways, and are not intended to limit the scope of the invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of a preferred embodiment of the invention as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are directions with reference to the attached drawings only. Therefore, the directional terms used in the embodiments are used for description and are not intended to limit the present invention.

Referring to fig. 1, 2, 3, 4, 5, 6, 7 and 8, fig. 1 shows an exploded view of an optical system 100 according to an embodiment of the present invention, fig. 2 shows a perspective view of the optical system 100 in fig. 1 after being assembled, fig. 3 shows a perspective view of the optical system 100 in fig. 1 after removing a front cover H2, fig. 4 shows a perspective view of an internal mechanism of a housing H1 in fig. 3, fig. 5 shows an exploded view of the internal mechanism of the housing H1 in fig. 3, fig. 6 shows a perspective view of the carrier 20, the frame 30 and the connecting member 40 in fig. 1 after being assembled, fig. 7 shows an exploded view of the carrier 20, the frame 30 and the connecting member 40 in fig. 6 after being assembled, and fig. 8 shows a schematic view of the four cantilevers 41 of the connecting member 40 connecting the carrier 20 and the frame 30 through a clamping member 50 and a spherical element B.

The utility model discloses an optical system 100 is the camera device that can install in vehicle inside, it mainly includes an optical module 10, a carrier 20, a frame 30, a connecting piece 40, a plurality of holder 50, set up in a circuit board 60 in the frame 30 outside, a base 70, a cable 80, a casing H1, a protecgulum H2 of connecting casing H1, a plurality of magnet M, a plurality of globular element B of setting on connecting piece 40, a plurality of coils C of setting on circuit board 60, a circuit module P, a plurality of elastic component W, two hollow support element F1, F2 and a plurality of locking part S.

As can be seen from fig. 1, 2, 3, 4, and 5, the optical module 10 includes an optical element 11 (e.g., an optical lens) and an image sensing unit 12 connected to each other, wherein the image sensing unit 12 is fixed inside the supporting member 20, and external light can sequentially pass through the opening H21 of the front cover H2 and the optical element 11 along an optical axis O of the optical module 10 to reach an image sensor inside the image sensing unit 12, so as to generate a digital image.

It should be understood that the base 70, the housing H1 and the front cover H2 can constitute a fixed portion of the optical system 100, and the carrier 20 and the frame 30 can constitute a movable portion of the optical system 100, wherein the movable portion is movably connected to the fixed portion by the elastic member W, so as to suppress and alleviate the adverse effect of the vibration of the optical system 100 caused by the external force on the optical module 10.

Specifically, the carrier 20 is movably disposed in the frame 30, the magnet M is fixed in a recess 21 (shown in fig. 6 and 7) outside the carrier 20, and the coil C is fixed on the circuit board 60.

It should be understood that when the coil C is energized, an electromagnetic driving force is generated to drive the supporting member 20 to rotate around the X-axis or the Y-axis relative to the frame 30, so as to achieve Optical Image Stabilization (OIS).

In the present embodiment, the Circuit board 60 is a Flexible Printed Circuit (FPC), and it surrounds the outer side of the protruding portion 31 (as shown in fig. 6 and 7) of the frame 30.

The flat plate-like support units F1 and F2 are fixed to the base 70 and the frame 30, respectively, and four elongated elastic members W (e.g., wires) are connected to the support units F1 and F2.

In addition, the Circuit assembly P includes two Circuit boards P1 and P2 and a connecting Circuit P3, wherein the connecting Circuit P3 is, for example, a Flexible Printed Circuit (FPC) for connecting the two Circuit boards P1 and P2.

The cable 80 is fixed on the bottom side of the base 70 for electrically connecting the circuit board P1 on the bottom side of the circuit assembly P to a power device or a computer host, wherein the base 70 can be fixed on a vehicle (such as a car, a motorcycle or a bicycle) through the locking member S for photographing the scenery around the vehicle.

As shown in fig. 6, 7 and 8, the carrier 20 and the frame 30 are connected to each other by a connecting member 40, wherein the connecting member 40 is made of a metal material and has flexibility.

Specifically, the connecting member 40 includes four elongated suspension arms 41 and a circular frame 42, wherein the circular frame 42 connects the four suspension arms 41, and the ball-shaped element B is disposed at the tail end of the four suspension arms 41, and the clamping member 50 has a U-shaped structure for clamping the ball-shaped element B.

It should be noted that, as shown in fig. 7 and 8, a plurality of

slots

22 and 32 are formed on the bottom sides of the carrier 20 and the frame 30, respectively, wherein the clamping members 50 are fixed in the

slots

22 and 32, respectively.

Specifically, two of the cantilevers 41 of the connecting member 40 can be fixed in the slots 22 of the carrier 20 by the clamping members 50 and the ball-shaped elements B, and the other two cantilevers 41 of the connecting member 40 can be fixed in the slots 32 of the frame 30 by the clamping members 50 and the ball-shaped elements B, so that the carrier 20 can rotate around the X-axis or the Y-axis relative to the frame 30.

Next, referring to fig. 1 to 5 and fig. 9 to 12, fig. 9 shows a cross-sectional view of the optical system 100 in fig. 2 with the front cover H2 removed, fig. 10 shows another cross-sectional view of the optical system 100 in fig. 2 with the front cover H2 removed, fig. 11 shows a cross-sectional view of the optical system 100 in fig. 2 with the optical module 10 and the front cover H2 removed, and fig. 12 shows a perspective view of the elastic piece W connecting the supporting units F1 and F2.

As shown in fig. 9 and 10, an image sensor 121, a circuit substrate 122 and a connector 123 are disposed inside the image sensing unit 12 of the present embodiment, wherein the image sensor 121 is disposed on the circuit substrate 122, and the connector 123 is electrically connected to the circuit substrate 122 and the circuit board P2 on the top side of the circuit assembly P, wherein light can pass through the optical element 11 along the optical axis O direction of the optical module 10 and then reach the image sensor 121 inside the image sensing unit 12, so as to generate a digital image, and the digital image can be transmitted to a host computer outside the optical system 100 through the circuit assembly P and the cable 80.

As can be seen from fig. 9 and 12, the supporting units F1 and F2 may be made of metal or plastic, and each of the supporting units F1 and F2 includes two hollow plate-shaped supporting members, wherein one end of the elastic member W is sandwiched between the two supporting members of the supporting unit F1, and the other end of the elastic member W is sandwiched between the two supporting members of the supporting unit F2.

As shown in fig. 9 and 10, a damping member G (e.g., gel) is provided between the housing H1 and the frame 30 of the optical system 100, so that the frame 30 is prevented from colliding with the housing H1 and damaging the structure thereof.

Specifically, the four elastic members W in the present embodiment are located at four corners of the quadrangular base 70, respectively.

However, in an embodiment, only one elastic member W may be disposed at one of the corners of the quadrangular base 70; alternatively, the elastic member W may be provided at two corners or opposite sides of the quadrangular base 70; alternatively, the three elastic members W may be respectively disposed on three sides or corners of the quadrangular base 70; alternatively, the elastic members W may be disposed on four sides of the quadrangular base 70, respectively, which is not limited by the disclosure of the embodiment of the present invention.

It should be understood that the base 70 and the frame 30 are connected by the elastic member W to suppress the vibration of the optical system 100 at the first frequency, wherein the first frequency is greater than 1Hz; in addition, it can be seen from fig. 12 that a plurality of bumps F21 are formed around one of the supporting units F2 for connecting the bottom of the frame 30, and recesses F22 are formed between adjacent bumps F21 for respectively connecting the elastic members W.

In this embodiment, the elastic element W may not be electrically connected to the circuit element P, but only serve as a passive damping mechanism. However, in an embodiment, the elastic element W may also be electrically connected to the circuit component P for grounding.

On the other hand, it can be seen from fig. 11 that the present embodiment can generate an electromagnetic driving force to drive the carrier 20 to displace relative to the frame 30 by providing the magnet M and the coil C on the carrier 20 and the frame 30, respectively.

However, in another embodiment, a piezoelectric element (SMA) or a Shape Memory Alloy (SMA) element may be disposed between the carrier 20 and the frame 30 to replace the magnet M and the coil C, so as to achieve the purpose of Optical Image Stabilization (OIS).

It should be understood that the magnet M and the coil C serve as an active damping mechanism for damping the vibration of the optical system 100 at the second frequency, wherein the second frequency is lower than the first frequency, and the first frequency is higher than 1Hz.

In another embodiment, the first frequency may be greater than 10Hz, and the second frequency is less than the first frequency.

As mentioned above, the optical system 100 of the present embodiment not only has the inactive damping mechanism composed of the elastic member W, but also has the active damping mechanism composed of the magnet M and the coil C, so that the corresponding suppression effect can be generated for the vibrations with different frequencies, and thus the optical system 100 can be used in a driving state, so as to greatly improve the performance and stability thereof.

Referring to fig. 13 and 14, fig. 13 is a perspective view illustrating that the supporting units F1 and F2 of the optical system 100 are connected to each other by a spring R according to another embodiment of the present invention, and fig. 14 is a sectional view illustrating that the supporting units F1 and F2 of the optical system 100 are connected to each other by an elastic member W and a spring R.

As shown in fig. 13 and 14, another embodiment of the present invention can also additionally provide a spring R between the supporting units F1 and F2, wherein the spring R connects the supporting units F1 and F2, so as to further enhance the shock-absorbing effect of the optical system 100, and the circuit assembly P can further pass through the spring R to effectively utilize the space (fig. 14), thereby achieving the miniaturization of the optical system 100.

In an embodiment, the spring R may be disposed and the elastic member W may be removed, which is not limited to the disclosure of the embodiment of the present invention.

Referring to fig. 15, fig. 15 is a schematic view illustrating the spherical element B located between two adjacent elastic members W.

As can be seen from fig. 15, four spherical elements B are located on the four sides of the movable portion composed of the carrier 20 and the frame 30, and the spherical elements B are interposed between two adjacent elastic members W in the horizontal direction (X-axis direction or Y-axis direction); in addition, the spring R surrounds the optical axis O, wherein the four spherical elements B are symmetrical with respect to the optical axis O and can serve as universal joints (universal joints) between the carrier 20 and the frame 30, so that the stability of the optical system 100 can be greatly improved.

In one embodiment, the optical system 100 may further include a position sensor (not shown), such as a Hall-effect sensor (Hall-effect sensor), disposed on the supporting member 20 or the frame 30 for sensing a position change of the supporting member 20 relative to the frame 30.

In an embodiment, the optical system 100 may also include an inertial sensor (not shown) disposed on the carrier 20 for sensing a posture change of the optical module 10.

To sum up, the utility model provides an optical system 100, it not only possesses the inactive damper who constitutes by elastic component W and/or spring R, has also possessed the active damper who constitutes by magnet M and coil C simultaneously for restrain optical system 100's low frequency and the vibrations of high frequency, thereby make optical system 100 can use under the driving state, and can promote its efficiency and stability by a wide margin.

Although the embodiments of the present invention and their advantages have been disclosed in the foregoing description, it should be understood that various changes, substitutions and alterations can be made herein by those skilled in the art without departing from the spirit and scope of the invention. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but rather, the process, machine, manufacture, composition of matter, means, methods and steps described in connection with the embodiment disclosed herein will be understood to one skilled in the art from the disclosure to be included within the scope of the present application as presently perceived, or in any future developed process, machine, manufacture, composition of matter, means, method and steps. Accordingly, the scope of the present disclosure includes the processes, machines, manufacture, compositions of matter, means, methods, and steps described above. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present invention also includes combinations of the respective claims and embodiments.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto, and modifications and variations can be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims

1. An optical system, comprising:

an optical module;

a movable part for carrying the optical module;

a fixed part; and

an elastic component is connected with the movable part and the fixed part and used for inhibiting the vibration of a first frequency of the optical system.

2. The optical system of claim 1, wherein the elastic member is a steel cable or a spring or a combination thereof.

3. The optical system of claim 1, wherein the elastic element is disposed at a corner of the fixing portion.

4. The optical system of claim 1, wherein the optical system includes two elastic members disposed on opposite sides of the fixed portion.

5. The optical system of claim 1, wherein the optical system comprises three elastic members disposed at different sides or different corners of the fixing portion.

6. The optical system of claim 1, wherein the fixed portion has a quadrilateral structure, and the optical system includes four elastic members respectively disposed at four corners of the fixed portion.

7. The optical system of claim 1, further comprising a circuit assembly, and the optical module comprises an optical device and an image sensing unit connected to each other, wherein the circuit assembly is electrically connected to the image sensing unit, and the elastic element is electrically independent from the circuit assembly.

8. The optical system of claim 1, further comprising a circuit assembly, wherein the optical module comprises an optical element and an image sensing unit connected to each other, and wherein the circuit assembly is electrically connected to the image sensing unit and grounded via the elastic member.

9. The optical system of claim 1, further comprising a support unit fixed to the movable portion and connected to the elastic member.

10. The optical system of claim 9, wherein the supporting unit is formed with a plurality of bumps, and the plurality of bumps are connected to the movable portion.

11. The optical system as claimed in claim 10, wherein a recess is formed between the bumps, and the elastic member is connected to the recess.

12. The optical system of claim 1, further comprising a spring connecting the movable portion and the fixed portion, wherein the spring surrounds an optical axis of the optical module.

13. The optical system of claim 12 further comprising a circuit assembly, and the optical module comprises an optical element and an image sensor unit connected to each other, wherein the circuit assembly is electrically connected to the image sensor unit and passes through the spring.

14. The optical system of claim 1, further comprising a damping element disposed between the fixed portion and the movable portion.

15. The optical system of claim 1, wherein the movable portion has a supporting member movably connected to the frame and supporting the optical module, a frame, and an active damping mechanism disposed on the supporting member and the frame for damping a second frequency of vibration of the optical system.

16. The optical system as claimed in claim 15, further comprising a connecting member, a plurality of holding members and a plurality of ball members, wherein the plurality of ball members are disposed on the connecting member, the plurality of holding members are respectively fixed on the supporting member and the frame and respectively hold the plurality of ball members.

17. The optical system of claim 16, comprising a plurality of elastic members disposed at different corners of the fixed portion, and a plurality of the clamping members disposed at different sides of the movable portion, wherein the positions of the clamping members are respectively between adjacent elastic members.

18. The optical system of claim 15, wherein the active damping mechanism comprises a coil and a magnet, the magnet is disposed on the carrier, and the coil is disposed on the frame.

19. The optical system of claim 15 wherein the active damping mechanism comprises a piezoelectric element or a shape memory alloy element disposed between the carrier and the frame.

20. The optical system of claim 15, further comprising a position sensor disposed on the carrier or the frame for sensing a change in position of the carrier relative to the frame.

21. The optical system of claim 15, further comprising an inertial sensor disposed on the carrier.

22. The optical system of claim 15 wherein the second frequency is less than the first frequency.

23. The optical system of claim 20 in which the first frequency is greater than 1Hz.

24. The optical system of claim 20 wherein the first frequency is greater than 10Hz.